Hand tacking-machine



(80 Model.)

W. SHAW. HAND TAGKING MACHINE.

7 Patented Oct. 13, 1896.

m/ VENIOR WZZZ Maw WITNESSES:

BY wadmrwaad,

ATTORNEYS.

UNITED STATES PATENT OFFICE.

"WALTER SHAXV, OF BOSTON, MASSACHUSETTS.

HAND TACKING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 569,590, dated October18, 1896. Application filed February 24:, 1896. Serial No. 680,294. (Nomodel.)

To all whom it nmy concern:

Be it known that I, WALTER SHAW, of Boston, in the county of Suffolk andState of Massachusetts, have invented an Improvement in HandTacking-Machines and the Like, of which the following is aspecification, reference being had to the accompanying drawings, inwhich Figure 1 is a plan View of the head of the tacker. Fig. 2 is anelevation, partly in section; and Fig. 3 is an elevation of the upperpart of a tacker with the spiral spring partly removed.

Hand-tackers are instruments familiar to all persons skilled in the art,such a tacker as is shown in the drawings being described in LettersPatent to Frank Chase, No. 356, 620, dated January 25, 1887. In themachine there illustrated and in other machines of which aspring-plunger is a part the spiral spring D, whose function it is toelevate the plunger 13 after it has been forced down, is inserted aboutthe shank of the plunger before the machine is fully assembled, and whena new spring is to be inserted, which is a frequent occurrence, asbreakages are common, it has heretofore been necessary to take themachine apart in order to remove the broken spring and insert the newone.

My improvement consists in forming a slanting slot from the under to theupper side of the head of the plunger, which slot slants in accord withthe spiral of the spring. (See Fig. 2.) The spiral spring, which restsagainst the under side of the head I), may be turned around until itsouter end comes opposite the lower opening of the slot E, which it willenter if the spring be turned farther, and by continuing the turning ofthe spring it may be entirely removed. It may of course be replaced byreversing the process just described.

lVhat I claim is- In combination a plunger having a slotted head; aspiral spring surrounding the stem of the plunger; and guides for thestem of the plunger; the head serving as the upper abutment of thespiral spring, and the slot in the head as a channel through which thespiral spring may be inserted and removed by turning the spring,substantially as set forth.

WALTER SHAW.

Witnesses:

LUCY W. HASKELL, KATHERINE T. REHILL.

